A pantropical genus of 15 species; two species, given below, in the Neotropics. Pyrrhobryum is characterized by the elongate stems, distal and spirally arranged broadly to narrowly lanceolate or linear-lanceolate leaves; doubly toothed, bistratose leaf margins, costae distally toothed on the back, mostly isodiametric laminal cells uniform to near base, and sporophytes positioned somewhat midway on stem or near the base. Both species were previously placed in the genus Rhizogonium. Pyrrhobryumspiniforme is generally encountered below 2500 meters, and is replaced by P. mnioides at higher elevations.